Furnace for burning cane-trash



(No Model.) 2 Sheets-Sheet 1.

0. SPREGKBLS & J. MOORE. Furnace for Burning Oane Trash.

No. 236,465. Patented Jan. 11-,1881.

N. PETERS. PHOTO-LITHOGRIPNER, WASHING ON D c Modem 2 Sheets-Sheet 2-.

G. SPRECKELSpKI; J. MOORE. Furnace for Burning Cane Trash.

Patented Jan. 11,188].

Fig-5:

m m MN MW.

TON. D c.

METERS, PHQTO-UTHOGRAPHER. WASHING CLAUS SPRECKELS AND JOSEPH MOORE,OFSAN FRANCISCO, CALIFORNIA.

FURNACE FOR BURNING CANE-TRASH.

SPECIFICATION forming part of Letters Patent No. 236, 465, dated January11, 1881.

Application filed May3, 1880. (No model.)

T all whom it may concern:

Be it known that we, CLAUS SPREOKELS and JOSEPH MOORE, both ofthe cityand county of San Francisco, in the State of California,

one of the United States of America, have invented new and usefulImprovements in Furnaces forBurning Bagasse or Cane-Trash; and we dohereby declare that the following is a full, clear, and exactdescription of the construction and Operation of our said invention,

reference being had to the accompanying drawings.

The first partof ourinvention relates to certain improvements in thetire-chamber and the 1 grate or fuel-supporting surface ofbagasse orcane burning furnaces; and the second part of our invention to a meansor apparatus for automatically feeding the hagasse orcane-trash to thefurnace.

Ne construct our furnace of an iron rim or case independent of theboiler, but of a shape to receive or be connected to the front endthereof, and to give a greater height of fire and combustion space thanis afforded in the 2 fire-chambersofordinaryboiler-furnaces. This caseis lined with brick or tire-clay, and is provided with a feed-hopper ontop and near its front line or wall. Below the inlet of this hopper,within the chamber, we arrange an in- 0 clined grate or fuel-supportingsurface, which is capable of adjustment to occupy a greater or lessdegree of inclination beneath the fuelinlet, as may be required,according to the kind or quality of fuel used. This gratesur- 5 facefills up the space between the side walls of the chamber, and its frontend is pivoted or hinged to a plate or bridge fixed to and projectingfrom the front wall ofthe furnace, about midway between the bottom orash-pit and the 40 roof of the chamber, so that a large space below thegrate is afforded for the reception of the ashes. The surface of thisgrate we construct of a num ber'of flat plates or bars placed one aboveand in advance of the other in a regular manner, with a free verticalspace between the surface of one plate and the edge of the nextadjoining one, similar to the arrangement of a flight of steps, and therear and lower end of the grate is connected to horizontal rods, whichextend through the space at the bottom of the chamber and through itsfront wall, wherethey run through adjusting-nuts, the front ends of therods being cut with screw-threads for this purpose. Below thebridge-plate, on the frontwall of the chamher and beneath the inclinedgrate-surface, we provide a large opening covered by a sliding door forthe purpose of supplying air in sufficient quantity beneath the fuel,and for giving also ready means of access to the entire surface 0f thegrate below the fire, for raking or keeping the draft free and clear ofobstructions. We also provide a fuel-door in the front wall and abovethe grate, for the introduction of fuel of the ordinary kinds in firingup the fur-' nace or in burning other kinds of fuel than the cane-trashin cases where the supply of the latter is interrupted or exhausted.

The means or apparatus which we construct and employ for feeding thebagasse to the fur- 7: nace consists of the teed-hopper above describedas situated on top of the furnace or fire-chamber, and havinga pair offluted feeding-rollers located within it, and an endless traveling apronor carrier of the width of the 7 hopper extending from its upper end ormouth to any desired distance and. point of supply of the bagasse. Thefeeding-rollers and the endless carrier are geared together, so that thespeed of both shall be uniform and the feeding of the fuel shall proceedin a regular manner without choking in the hopper. To regulate thethickness or amount of fuel upon the endless apron to be carried intothe hopper, we provide an adjustable plate or striker upon the hopperiust over the edge of the apron, by which any excess of fuel lying onthe apron above the line of the top of the hopper is caught by thestriker as the endless apron moves forward and prevented from fallinginto 0 the hopper.

Referring to the accompanying drawings, Figure l is a side elevation ofour improvement as applied to a boiler, the side wall of the furnacebeing broken away and the feed- 5 hopper and fuel-carrier being shown insection. Fig. 2 is a front View of Fig. 1. Fig. 3 is a transversesection taken vertically across the furnace and looking toward the frontwall thereof. Fig. 4 is a top or plan view of the inclined grate, andFig. 5 is a detailed view of one of its plates or bars.

A is the outer rim orcase of the furnace; B, the front end of the boilerto which the furnace is connected, and O is the fire-proof linin g.

D is the front wall, in which are the fueldoor D and the large openingcovered by the door D E is the inclined grate, and f the bridgeplate, towhich the grate is hinged at e e.

F F are the rods that support and hold out the lower end of the grate.These rods are pivoted to the end of the grate at g, and are held bymeans of the nuts h h on the screwthreaded ends 2' i.

G is the inlet from the feed-hopper H, and I is a sliding gate or damperfor controlling the opening leading from the hopper.

K K are the fluted feeding-rollers,which are geared together and to thedriving-roller L of the endless carrier or apron M, so that the apronand rollers shall travel at a uniform rate of speed.

N is the plate or striker placed above the opening m in the side of thehopper H.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

1. The furnace or fire-chamber adapted to receive or be connected to theend of a boiler, having an inclined grate, E, the highest point of whichis at the front of the chamber, and provided with a feed-inlet, G, andfeed-hopper H, situated on top and across the front end of the furnace,in combination with the feeding device, consisting of the feed-rollers KK and the endless traveling fuelcarrier M, an v ranged below the top orrim of the hopper and above the feed-rollers, said rollers and carrierbeing operated to travel at the same rate of speed, substantially asdescribed, for the purposejset forth.

2. In combination with a bagasse or caneburning furnace having aninclined grate, the highest point of which is at the front of thefurnace, the feeding device or apparatus for automatically introducingand supplying the fuel to and across the highest part of the grate,consisting of the feed-hopper H, with its feeding-inlet across the topand front end of the furnace, the feeding-rollers K K within the hopper,and the endless traveling apron or carrier M, placed at the side of thehopper at a point below the top or rim thereof, and connected with saidrollers or driven so as to move at uniform speed with them,substantially as described, for the purpose set forth.

3. The hopper H, having the feedrolls K, the endless travelingfuel-carrier M, arranged to introduce the fuel into the hopper at theside and below the rim or top thereof, and the striker N, placed abovethe line of travel of the carrier M,in combination with the furnace,substantially as and for the purpose set forth.

Witness our hands and seals this 15th day of March, A. D. 1880.

OLAUS SPREOKELS. L. S. JOSEPH MOORE. L. S.

Witnesses:

EDWARD E. Osnomv, WM. F. CLARK.

